Sink splash guard



FIG. 1 is an environmental view of the ornamental design of the sink splash guard of the invention;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a rear perspective view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines showing environment form no part of the claimed design. 

CLAIM The ornamental design for a sink splash guard, as shown and described. 